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World's largest pilots' union asks U.S. to improve cockpit procedures for Boeing 737 MAX

SEATTLE/MONTREAL/CHICAGO, Sept 21 (Reuters) - The U.S. aviation regulator should require new cockpit procedures for Boeing Co’s 737 MAX to help pilots disable an erroneous stall alert that could be a serious distraction during mid-flight emergencies, the world’s largest pilot union said on Monday.

The proposal about an erroneous “stick shaker” alert is among recommendations the Air Line Pilots Association (ALPA) submitted during a 45-day public comment period for proposed 737 MAX design and operating changes laid out last month by the U.S. Federal Aviation Administration (FAA).

The deadline for comments was Sept. 21.

The 737 MAX changes could pave the way for the FAA to lift a ban on the jet, potentially before year-end. The 737 MAX was grounded worldwide 18 months ago after crashes killed 346 people in Ethiopia and Indonesia.

In both crashes, pilots grappled with Boeing’s flawed MCAS flight control system, which repeatedly forced down the jet’s nose, and multiple audio and visual warnings that included the rapid and noisy rattling of their control column known as “stick shaker” and excess speed.

The proposals, which include recommendations for pilots during emergency situations, come during a U.S.-led gathering of regulators in the UK for a training review of the MAX.

While the FAA is in charge of certifying the MAX, other regulators like Transport Canada and the European Union Aviation Safety Agency (EASA) could add different training requirements as part of their validation of the aircraft.

ALPA proposed steps that would allow flight crew to identify and pull a circuit breaker to stop the stick shaker after they confirm an alert is erroneous, echoing an earlier recommendation by Transport Canada.

Among other comments, the National Transportation Safety Board has called the FAA’s proposed changes “positive progress,” while crash victims’ families have said Boeing’s changes to MCAS do not address the jet’s underlying aerodynamic problem. (Reporting by Allison Lampert in Montreal and Tracy Rucinski in Chicago Writing by Eric M. Johnson; Editing by David Gregorio)